Sony MDS-JE630 Error Rate Check, Focus Bias Check, Auto Gain Control Output Level Adjustment

13. ERROR RATE CHECK

13-1. CD Error Rate Check

Checking Procedure :

1.Load the check disc (MD) TDYS-1.

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob and display “CPLAY MODE” (C30).

3.Press the [YES] button twice and display “CPLAY MID”.

4.The display changes to “C = AD = ”.

5.Check that the C1 error rate is below 20.

6.Press the [MENU/NO] button to stop playback, then press the [ÊÊÊÊÊEJECT]¤ button and take out the check disc.

13-2. MO Error Rate Check

Checking Procedure :

1.Load the continuously-recorded disc. (Refer to “5. CREAT-

ING CONTINUOUSLY-RECORDED DISC”)

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “CPLAY MODE” (C30).

3.Press the [YES] button to display “CPLAY MID”.

4.The display changes to “C1 = AD = ”.

5.If the C1 error rate is below 50, check that ADER is 00.

6.Press the [MENU/NO] button to stop playback, then press the [ÊÊÊÊÊEJECT]¤ button and take out the test disc.

14. FOCUS BIAS CHECK

Change the focus bias and check the focus tolerance amount.

Checking Procedure :

1.Load the continuously-recorded disc. (Refer to “5. CREAT-

ING CONTINUOUSLY-RECORDED DISC”)

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “CPLAY MODE” (C30).

3.Press the [YES] button twice to display “CPLAY MID”.

4.Press the [MENU/NO] button when “C = AD = ” is displayed.

5.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “FBIAS CHECK” (C05).

6.Press the [YES] button to display “ / c = ”.

The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value.

Check that the C1 error is below 50 and ADER is below 2.

7.Press the [YES] button and display “ / b = ”. Check that the C1 error is about 200 and ADER is below 2.

8.Press the [YES] button and display “ / a = ”. Check that the C1 error is about 200 and ADER is below 2

9.Press the [MENU/NO] button, then press the [ÊÊÊÊÊEJECT]¤ but- ton and take out the disc.

Note 1: If the C1 error and ADER are above other than the specified value at points A (step 8. in the above) or B (step 7. in the above), the focus bias adjustment may not have been carried out prop- erly. Adjust perform the beginning again.

15. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT

Be sure to perform this adjustment when the optical pick-up is replaced.

If the adjustment results becomes “Adjust NG!”, the optical pick- up may be faulty or the servo system circuits may be abnormal.

15-1. CD Auto Gain Control Output Level Adjustment

Adjusting Procedure :

1.Load the check disc (MD) TDYS-1.

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “AG Set (CD)” (C26).

3.When the [YES] button is pressed, the adjustment will be per- formed automatically.

“Complete!!” will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to “AG Set (CD)”.

4.Press the [ÊÊÊÊÊEJECT]¤ button and take out the check disc.

15-2. MO Auto Gain Control Output Level Adjustment

Adjusting Procedure :

1.Load the test disc (MDW-74/AU-1).

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “AG Set (MO)” (C25).

3.When the [YES] button is pressed, the adjustment will be per- formed automatically.

“Complete!!” will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to “AG Set (MO)”.

4.Press the [ÊÊÊÊÊEJECT]¤ button and take out the test disc.

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